Pencil-sharpener.



.STATES ,PATENT OFFICE.-

CHARLES@ SPENGLER, OF ROCKFORD.. ILLIOIS, ASSIGNR TO AUTOMATIC PENCIL jSnfARPENER COMPANY, or raw YORK,

N. Y., A. ooRPonATron or New Yoan...

PnNorL-snAnPNnn.

no. scenes.

Specification of Letters IPatent.

Patented Oet. 175, 1907.

' Application l Febluy 13,1907. Serial No. 357,152;

Beit known lthat I, CHARLns C. SPENGLER, a'citizen loffthefUnitedStates, residing at Rockford, in the county of Winnebago and State of Illinois, have in-4 vented certain new and useful Imprevements'in Peni cil-Sharpeners, of which the following is a specification. ne of the objects of this invention is the production .in order to prevent breakage. Another object of the invention is of'rneans for permitting the cutting element to yield the provision of improved means for rotating the pencil being operated upon. v'.lhe' invention also relates' to theother 'and further improvements in p'encil Sharpeners hereafter set forth. f In the accompanying drawings Figure 'l is a front :elevation of a pencil Sharpener embodyingthe features. of my 'inventionfa portion -of the base being -brokn away. Fig. 2- is a top planview of said ma fao' chine. Fig, 3 is a yernical sectional view'thm'ugh the machinetaken on the plane of dottedline 3 3^'of Fig.-l.

Figf4 is la. horizontal section on dotted .line 4 4 of Fig.

1. Fig. is a viewsnuarj to that of Fig. a,v illustraingan alternative constrcton.

' .-.In the embodiment herein shown'-y the mechanism of the machine is supported upon a base 1 constructed to A receive within it a drawer for' catching the shavings and dust resulting ,inthe operation Vof the' machine, saidshavings and dust fallingthrough an opening 3 -in the upper wall ofsaid base into said drawer 2.

Asupportin'g memberv4' havin'g a vertcally-extending, plane face 5 lis fixed to the top-of Vthe basel in' any .i 4'Near the lower end of theopening 7j is a shoulder 8l pencil'isjully sharpened. A sleeye vis rotatably ',perportionlO of ythe openingl, the lower end of said suitable way,i as by means ofthe screws 6. In said supporting-'member is `formed a` clindric al opening 7:

to'receive'thepencil; said opening extending to the .face-5 vof the supporting member and taperingat its lower v'end to correspond to the end o f the pencil by thecutting mechanism..

'againstwhich' the point of the pencil lodges whenthe situated in vsie enlarged up- 'sleeve bearing upon'the annular shoulder 1I. .Within vsadsleeve is.- provided me ans for frictionally' engaging thepencil-, said lneans'comprising a plurality .of

fingers 12,' secured torthe outer side ofy said.

sleeve and having inwardly ,bent portions" 13 exte nd 'i member 4,; is rotatably mounted an internal spur gear "A 15 is fixed to the'sleeve 9 and carries. a periph.-A eral series'of teeth 16. n

The sleeve 9 i held in place prevented 4 from Upon a pivot screw 19 seated the supporting shape given'4 the' lower 20, having secured to one side a crank 21 `by means of which it may be rotated.

About the periphery of the spurgear wheel is a plurality of projections 22 adapted to engage'the teeth 16 and thereby impart a succession of partial rotations to thev sleeve 9.

' The spur gear 20 meshes with-a pinion Z'Bfiired upon one 4end of a shaft 24.rotatably mounted in the supporting member 4l To the'other end of the. shaft 24 isfured a crank or face plate 25. i

A lcnife arm 2 6 having 'an elongated`A opening 27 therein'is secured to the supporting member l by means of a screw 28 extending through said. elongated opening into said supporting member.

At a point between its ends the knife arm 26 is c onnected to the f ace plate through the agency of a screw 29, said screw passing'freely through'an opening in said knife arm into a screw-threaded opening in said face plate.

To permitthe' knife arm 26to spring'outwardly in case a pencily be forced into the opening 7-when said knife arm overlies the lower open end of said openings,

l interpose a coiledy spring 30 between the head of the screw 29 and the knife arm 26.

A practical embodiment that maybe resorted to and which I consider substantially equivalent to that just described, is shown 5 of the drawings and con siste in attaching the pivot screw 3l to the knife arm 426 and face plate 25 in such a manner 'that -it extends rearwardly Vinto an annular recess 32 formed for it in the supporting member. A spring 33 is provided-between the head of said screw and-the face plate 25,'subst`antiallyas in the form first described. y

. A knife blade 34'i's secured to one end of the' knife arm 26 in position to pass over the lower open end of the opening 7 during the movement of s'aid knife arm. I

prefer to fasten thev knife blade 34 to said knife arm in sucha manner -as to permit of removing the blade, if desirable, for sharpening or renewal. vIn the present instance, -said blade is secured to the knife arm by means of pins 35 fixed in saidknife arm and lying within openings in the' knife blade, and ascrew'36. In use, the' pencil is'inserted into the opening 7, the lower portion projecting to a greater or less extent through the lower end of said opening beyond the face 5 fresh portions of the pencil to the'knife. i In'its operation, the knife draws the pencil downward in its opening until the point oi the I- claim as my invention:

1. In a pencil Sharpener, in combination, a supporting member.; an internal spur gear rotatablyanounted upon said supporting member;y a shaft rotatably mounted in said supporting member; apinion ou one end of said shaft meshing with said spur gearz, a crank .fixed to the other end of said shaft 4: and a. cutting element moved by said crank.

2. In a pencil Sharpener, in combination. a cutting element; a crank arm pivotaliy connected with said cutting element; and-a spring'moving with said crank arm and vadapted to permit of a lateral yielding, movement of said cutting.r element.

3.- In a pencil Sharpener, in combination, a cutting element; a crank .ar-m; a crank pin carried by said crank armfor connecting said cutting element and said :11111;: and a spring engaging said crank pinadaptcd to permit of a iateralyielding movement of said cutting elementi 4. In a pencil Sharpener, in combination, a cutting.r ele` .'1. In a pencil Sharpener. in combination. a fined inembcr: a knife arm having an elongated opening: therein: a member extending; through said elongated opening.Y nud fixed t0 said tixcd member: n rotatable crank: :i crank pin carried b v said crank for connectingr said knife nrm and said crank and n spring engaging' said crank pin and adapted to permit. of a lateral yielding' movement ot said knife arm.

(i. In a pencil Sharpener, in combination, a ixcd member; a knife arm havingr :1n elongated opening: therein', n member extendingthrough said elongated openingY and fixed to said fixed member; a rotatable crank; n lncmbcr pivotally connecting said knife arln and said crank; :lud a spring tending to hold said knife arm against interni niovement.

7. In a pencil Sharpener. in combination. :i supporting member having a plane face and adapted to support a pencil: an ir :rnal spur gear rotatably mounted upon the rear side of said supporting member: a shaft rotatably mounted in sa d :supportingY member; a pinion txed to one end of said shaft and me'fhingr {vith said internal spur near: a crank zixed to the other end of said shaft; a knife bar pivotaily connected with said crank; and `means for limiting' and guiding said knife arm.

8. in a pencil sharpener, in combination. n supporting,r member: a' gear wheel rotatably mounted thereon: means for supporting,r the pencily comprising; a sleeve having n projection thereon: a projection carried by said gear wheel adapted tto engage the projection or: said sleeve; and a cutting element 'drive'n by said ,frearwheel.

A9. In :1 pencil Sharpener, in combination, a rotatable pencihsupporting member havin."r a projection thereon; n cutting; element; a gear 4wheel for 'driving said cutting' element: and a projection on said ucar wheel adopted to engage said tix-st mentioned projection for rotating,r tbe pencil.

CHARLES C. SPENGLER.

'Witnesses C. PAUL llxnKnn, Gnoncn L. CHINDAHL. 

